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Product Description
How is it that the upper water pipe of the automobile water tank is hot and the lower water pipe is not hot?
The engine is an important part of the car and is called the heart of the car. The engine cooling system is the guarantee to control the stable operation of the engine at normal working temperature. The cooling system consists of the following components: water pump, thermostat, cylinder water jacket, cooling fan, water tank radiator and antifreeze water pipe. When the drain pipe of the engine is not hot in the car, there may be two situations.
The engine coolant temperature has not reached the normal temperature to open the thermostat, and the small circulation mode of the engine internal cooling system with antifreeze is under way. When the thermostat is opened, the engine enters a large cycle, and the heat of the upper and lower pipes will be basically the same. When there is a problem with the coolant circulation system, the engine sewer pipe will not be hot.
This is mostly because the thermostat does not open normally, the water pump fails, and the water tank and book cover block the air resistance, resulting in poor circulation channels. At this time, the water temperature may be too high. In this case, it is necessary to check and repair the engine in time to avoid abnormal damage of the engine caused by excessive temperature. Thermostats are generally installed on the water supply pipe of the cooling system.
When the engine temperature is not enough, the thermostat is closed. When the high-temperature coolant in the engine reaches the thermostat position, it stops flowing to the water tank, so the water supply pipe is hot. At this time, the low-temperature coolant pumped by the water pump from the water tank flows in the sewer pipe without participating in the heat dissipation cycle, and the sewer pipe naturally cools.
It is normal that there is a temperature difference between the upper and lower pipes. The high-temperature coolant heated by the engine circulates in the upper pipe and the coolant cooled by the water tank circulates in the lower pipe, so it is normal that there is a temperature difference between them. The reason that may lead to the hot water supply pipe and the cold water supply pipe may be the thermostat failure. When the thermostat fails, after the engine water temperature reaches the target temperature, the thermostat switch cannot be turned on and the thermostat is still closed, so the hot water supply pipe and the cold water supply pipe will appear.
The high-temperature coolant of the faulty water pump engine enters the water tank from the thermostat. After the water tank cools, it is pumped out by the water pump and sent back to the engine to participate in circulating heat dissipation. When the water pump fails, the pressure of coolant in the water tank is not enough to enter the engine cylinder for cooling circulation, and the phenomenon that the upper water pipe is hot and the lower water pipe is cold will also occur.
